02 synthesis characterization and biological applications of water soluble zno quantum dots

... Materials and Characterization Methods 101 3.1.3.1 Materials 101 3.1.3.2 Characterization Methods 101 3.1.4 Results and Discussion 102 3.1.4.1 Synthesis of Monomers and Polymers 102 3.1.4.2 Color and ... The aim of this thesis was to syntheses and characterization of novel water- soluble conjugated polyelectrolytes and to study the structure-quenching and environment-quenching relationship of those ... concentration of PAANa and PMAANa _ 195 XVI SUMMARY The focus of this thesis was to syntheses and characterization of novel water- soluble conjugated polyelectrolytes and to study...

Ngày tải lên: 17/09/2015, 17:20

... fields of applications of pyrene derivatives 18 Figure 1.7 Various methods of phase transfer of NPs between water and organic medium 29 Figure 1.8 Mechanism of enhancement and quenching of pyrene ... solution of POLY7 before extraction (★) TEM images of the dropcasted film of DCM layer of vial (c) and vial (d) confirm transfer of AgNP and AuNP from water to DCM layer Insets show the TEM images of ... solution of POLY13 before extraction (★) TEM images of the dropcasted film of DCM layer of vial (c) and vial (d) confirm transfer of AgNP and AuNP from water to DCM layer Insets show the TEM images of...

Ngày tải lên: 11/09/2015, 10:19

... protein quantum dots aggregate (Figure 4a–d) AFM image of quantum dots, deposited from solution that Figure AFM (a, b, c, e) and STEM (d, f) images of CdTe quantum dots a–c AFM images of quantum dots ... (Figure 4a–d) show that quantum dots in aqueous media aggregate TGA coating makes CdTe quantum dots water soluble Washing out of coating decreases water solubility of quantum dots, increases aggregation ... single quantum dots) were seen This shows that CdTe–TGA quantum dots dissolved in aqueous solution are not stable, and aggregates and forms large clusters of quantum dots AFM image (Figure 4e) of...

Ngày tải lên: 21/06/2014, 08:20

... extracts (20 mg) were applied to the column and eluted with a linear gradient of solvent A (chloroform/ methanol : 4, v/v) and solvent B (chloroform/methanol/ water : : 2.5, v/v/v) starting with 0% ... of unlabeled molecules into the double-labeled liposomes leads to probe dilution and with that to a decrease in the efficiency of FRET: the emission intensity of the donor increases and that of ... respectively [23,30], and the bands at Fig Infrared spectrum in the spectral range 1800–900 cm)1 (A) and – in the range of the negatively charged phosphate band mas (PO2 ) 1300– )1 1190 cm (B) of hydrated...

Ngày tải lên: 21/02/2014, 00:20

... the metal particles, (ii) formation of liquid droplet of metal and Si/SiOx and (iii) the precipitation in the form of solid nanowires after super-saturation of liquid metal–Si/SiOx droplet at ... of crystalline Si core and amorphous SiO2 outer shell structure as confirmed by HRTEM image and SAED pattern On the other hand, the formation of crystalline Si–SiO2 core-shell nanowires first and ... agglomerated clusters consisting of high density of nanowires The magnified view of a single cluster is depicted in the inset of Fig 2(d) These observations suggest that growth of nanowires in the present...

Ngày tải lên: 16/03/2014, 15:18

... a very soft reaction that favors the growth of crystal will take place However, the changes in the number of the reductant and the species of precipitator would influence the synthesis of product ... surface of microspheres was made of a number of small subunits, each of which is like a tetrahedron crystal in shape and uniform in size and packed densely Fig 1e clearly exhibits that each of the ... standard pattern (JCPDS Card no 85-1436, a=8.393 A) The average diameter of the microspheres shown in Fig 1b is between 50 and 55 mm and each of them is very round The existing small holes and...

Ngày tải lên: 20/03/2014, 13:08

... volume of mL each of a solution of 3-phenylpropionitrile (181.5 mg) and 3-phenylpropionic acid (205.2 mg) in methanol (10 mL), and Tris/HCl buffer (990 mL, 70 mM, pH 8.5) were mixed, and mL from ... plot As a crude extract of recombinant AtNIT1 had a half-time of days at pH and °C, the in¯uence of antioxidants and protease inhibitors on enzyme stability was investigated Of the applied thiols ... FEBS 2 002 Synthetic applications of recombinant AtNIT1 (Eur J Biochem 269) 683 Fig Determination of the temperature optimum of AtNIT1 Fig Experimentally determined rates for the hydrolysis of 3-indolylacetonitrile...

Ngày tải lên: 23/03/2014, 21:21

... Line profile of the EDS intensities extracted from the elemental maps of Ge, Se and Au along the labeled solid line of the inset image (f) EDS line profile of Ge and Se along the diameter of the ... corners of (b, c and d) are the magnified SEM images of GeSe nanosheets (e and f) AFM image of GeSe nanosheet and the height profile corresponding to the solid line Figure 6.2 (a) Structure of two ... NANOSTRUCTURES: SYNTHESIS, CHARACTERIZATION AND OPTOELECTRICAL APPLICATIONS BABLU MUKHERJEE (M Sc., Physics, Indian Institute of Technology, Madras) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY...

Ngày tải lên: 10/09/2015, 09:06

... (A and C) and emission (B and D) spectra of dithienylethenes photochromism in chloroform solution; DTEPh (A and B) and DTE-Naph (C and D) 121 Figure 4.4 Change in the color upon irradiation of ... procedure of Buchwald coupling for the synthesis of OLG1-OLG4 7.6 185 7.4.2 General procedure for diazo-compound synthesis 7.5 Synthesis of Compounds in Chapter 7.4.1 General synthesis of intermediates ... electropolymerization of PCzMMA-b-PBMMA (c) and PFlMMA-b-PBMMA (d) 102 Figure 3.10 Linearity of current with number of scans of electropolymerization of block copolymers; PCzMMA-bPBMMA (a) and PFlMMA-b-PBMMA...

Ngày tải lên: 14/09/2015, 14:02

... Director, Office of Energy Research, Office of Basic Energy Sciences, Materials and Chemical Sciences Divisions of the U S Department of Energy under Contract DE-AC03-76SF00098 We thank Professor ... area of 765 m2 g-1 and a pore volume of 1.16 cm3 g-1 2.3 Preparation of Pt/SBA-15 Pt colloidal aqueous solution (25.6 mL, × 10-3 M) was mixed with 74.4 mL of water and 100 mL of ethanol The mixture ... nm, (d) 3.6 nm, and (e) 7.1 nm 3.2 Synthesis and Characterization of Pt/SBA-15 Catalysts 3.2.1 Incorporation of the Pt Particles in SBA-15 Structure SBA-15 with a pore diameter of 9.0 nm was used...

Ngày tải lên: 08/10/2015, 23:16

... Figure AFM and STEM images of GaSb/In0.53Ga0.47As QDs and histogram of the height of GaSb/In0.53Ga0.47As QDs (a) The AFM image of GaSb/In0.53Ga0.47As QDs, (b) histogram of the height of GaSb/In0.53Ga0.47As ... Optical and structural properties of InAsP ternary self-assembled quantum dots embedded in GaAs Appl Phys Lett 2 002, 81:2953 15 Liu G, Chuang S-L, Park S-H: Optical gain of strained GaAsSb/GaAs quantum- well ... distribution of GaSb/ InGaAs QDs on InP (100) substrate, the AFM and STEM measurements were carried out Figure shows the AFM and STEM images of GaSb/In0.53Ga0.47As QDs and the histogram of the height of...

Ngày tải lên: 20/06/2014, 20:20

... Doctoral Program of the Ministry of Education of China (No 20070335014), Zhejiang Innovation Program for Graduates (200 8022 ), and the foundation of 2008DFR 5025 0 Author details State Key Lab of Silicon ... al.: One-Pot Synthesis of Biocompatible CdSe/CdS Quantum Dots and Their Applications as Fluorescent Biological Labels Nanoscale Res Lett 2011 6:31 Submit your manuscript to a journal and benefit ... wavelength of 570 nm Four groups of MTT tests were done for each quantum dots concentration The values of MTT assay of labeled cells were expressed as the Page of percentage of corresponding control...

Ngày tải lên: 21/06/2014, 08:20

... synthesis and applications of oxide nanotubes and mesoporous materials attract intense research interests due to their chemical and physical properties This thesis reports the synthesis and characterization ... the catalysis, the synthesis and fabrication of nanostructure materials, the characterization of nanomaterials, and the applications of nanostructured materials in reforming of alcohols to produce ... production in steam reforming of ethanol (SRE) and CO2 reforming of ethanol (CRE) A fundamental understanding of the cause of the high activity and the stability of Rh/oxide-nanotube catalysts...

Ngày tải lên: 11/09/2015, 10:19

... was tested by formation of the complex between RasGTPcNH2 and the Ras-binding domain of the Ras effector protein c-Raf-1 MATERIALS AND METHODS General description of synthesis High pressure liquid ... methanol, again evaporated and dried over P4O10 Monoamido-phosphoric acid, H2PO3NH2, was prepared as described [11] Synthesis of GTPcNH2 and GTPcF Fig Chemical structure of the nucleoside triphosphate ... methanol and repeated evaporation under reduced pressure, yield of the pure GTPcNH2 was 50–60% One gram of GTP triethylammonium salt was added to a stirred solution of 2.5 mL tributylamine and 1.2...

Ngày tải lên: 18/03/2014, 01:20

... ( 1026 M ), did not affect the basal level of [3H]IPs and [3H]PIPs (Fig 8A,B) In the presence of 1026 M cyclo 128 [D -Leu5]OP, the effect of ODN, OP and cyclo128 OP ( 1028 M each) on [3H]IPs and ... ( 1027 2 1025 M ), the effect of OP and cyclo128 OP gradually declined The efficacy of cyclo128 OP in raising [Ca21]i was 1.4-fold higher than that of OP Repeated pulses of cyclo128 OP (3.16 Â 1029 ... concentrations of cyclo128 [D -Leu5]OP ( 1021 02 1026 M ) provoked a dose-dependent inhibition of the ODN-induced [Ca21]i increase with a pIC50 value of 7.17 ^ 0.29 (Fig 6) At a concentration of 1026 M ,...

Ngày tải lên: 24/03/2014, 04:21

... mechanism of ZnO NRs It is known that, the photoresponse of the ZnO NRs consists of two parts: a rapid process of photogeneration and recombination of electron–hole pairs, and a slow process of surface ... formation of depletion layer near the surface resulting in the band bending of the conduction band (C.B) and the valence band (V.B) Formation of large number of ionized www.intechopen.com ZnO Nanorods ... increase of electron density in the conduction band of ZnO by ZnO band edge absorption and electron transport via Au NPs (Dhara & Giri, unpublished) Fig 20 Photocurrent spectra of the as–grown NRs and...

Ngày tải lên: 28/04/2014, 13:15

... of opticalgrade thin films, and has the merits of low temperature, large scale, and low cost Fabrication of the solution-growth ZnO nanorod thin films 2.1 Fabrication of ZnO seed layers The ZnO- coated ... is obviously composed of a large bundle of the ZnO nanorods and most of nanorods not fuse together, as shown in Figs 2(e) and 2(f), which resulted in the formation of lots of unfilled inter-columnar ... morphology of ZnO seed layer can also significantly influence the prefer-oriented growth of ZnO nanorods (Lee et al., 2007) The smaller surface roughness of ZnO seed layer can induce the growth of ZnO...

Ngày tải lên: 28/04/2014, 13:15

... overview of the fundamentals and applications of nanosciences and nanotechnologies The methods described in this book are very powerful and have practical applications in the subjects of nanorods ... of concrete designs of plasmonic structures exhibiting collective oscillations of plasmons and broad-band plasmonic states, based on realistic and precise computations This chapter consists of ... equation (1), 2D periodic structure of the periodicities of dx and dy is assumed and incident wave vector has the components kx and ky The term Emn is Fourier coefficient of function E(x, y) For 2D periodic...

Ngày tải lên: 28/04/2014, 13:15

... overview of the fundamentals and applications of nanosciences and nanotechnologies The methods described in this book are very powerful and have practical applications in the subjects of nanorods ... hydrothermal synthesis can be operated at temperatures as low as 50°C for the deposition of ZnO nanostructures (Niarchos et al., 2010) Synthesis of ZnO nanorod arrays via ultrasonic-assisted sol-gel and ... improve the optical and electrical properties of ZnO (Yun & Lim, 2011) Figure 10 shows the FESEM morphologies and cross-sectional images of undoped (Fig 10(ac)) and Al-doped ZnO nanorod arrays...

Ngày tải lên: 28/04/2014, 13:15

... density and forms Direct chemical synthesis and a combination of ligands are all that are required for production and shape control of the nanorods Ligands also bond to different facets of the ... dissolving 440 mg of cetyltrimethylammonium bromide (CTAB) and 4.5 mg of www.intechopen.com Synthesis and Application of Nanorods 121 tetraoctylammonium bromide (TOAB) in 15 mL of water and transferred ... (length 15 cm and diameter cm) To this solution, 1.25 mL of 0 .024 M HAuCl4 solution was added along with 325 µL of acetone and 225 µL of cyclohexane The formation of the gold nanorod and its aspect...

Ngày tải lên: 28/04/2014, 13:15